10121111110109 has 4 divisors (see below), whose sum is σ = 10134272503740. Its totient is φ = 10107949716480.

The previous prime is 10121111110093. The next prime is 10121111110171. The reversal of 10121111110109 is 90101111112101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6452438227225 + 3668672882884 = 2540165^2 + 1915378^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121111110109 - 2⁴ = 10121111110093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121111119109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6580695662 + ... + 6580697199.

It is an arithmetic number, because the mean of its divisors is an integer number (2533568125935).

Almost surely, 2^{10121111110109} is an apocalyptic number.

It is an amenable number.

10121111110109 is a deficient number, since it is larger than the sum of its proper divisors (13161393631).

10121111110109 is an equidigital number, since it uses as much as digits as its factorization.

10121111110109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13161393630.

The product of its (nonzero) digits is 18, while the sum is 20.

The spelling of 10121111110109 in words is "ten trillion, one hundred twenty-one billion, one hundred eleven million, one hundred ten thousand, one hundred nine".